:root {
    --background-blue: #ECF6FF;
    --image-blue: #ADDAFB;
    --active-blue: #81C3F5;
    --button-blue: #D8EBFA;
    --text-color: #333;

    --total-width: 1178px;
    --item-width: 96px;
    --a-width: 86px;
    --i-width: 10px;
    --out-i-width: 18px;
}

body {
    background-color: var(--background-blue);
    font-family: "Microsoft YaHei", 'Times New Roman', Times, serif;
    font-size: 0.75rem;
    color：var(--text-color);
    text-align: center;
    padding: 0;
    margin: 0;
    padding-top: 60px;
}

a {
    color: var(--text-color);
    text-decoration: none;
}

a:hover {
    color: var(--active-blue);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    margin-top: 0;
    margin-bottom: 0.5rem;
}

ol,
ul {
    margin: 0;
    padding: 0;
    list-style: none;
}


.container {
    width: var(--total-width);
    background-color: #FFF;
    margin: 0 auto;
}

.row {
    clear: both;
    width: 100%;
    overflow: hidden;
}

.col {
    float: left;
}

.logo {
    float: left;
    width: calc(var(--a-width)*2 + var(--i-width) + var(--out-i-width));
    background-color: var(--active-blue);
    font-size: 1.5rem;
    font-weight: bold;
    line-height: 60px;
    letter-spacing: 2px;
}

.logo a {
    color: #FFF;
}

.logo span {
    font-size: 30px;
    margin: 0 10px;
}

.nav {
    float: right;
    width: calc(var(--item-width)*9 + var(--out-i-width));
}

.nav a {
    display: block;
    float: left;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    margin: 12px 10px;
}

.nav a:hover,
.nav a:first-child {
    color: #FFF;
    background-color: var(--active-blue);
    border-radius: 1rem;
}

.banner {
    background-color: var(--image-blue);
    height: 240px;
    position: relative;
}

.banner h2 {
    color: #FFF;
    position: absolute;
    left: calc(var(--total-width)/2 - 43px);
    top: calc(120px - 16px);
}

.banner .angle-left,
.banner .angle-right {
    position: absolute;
    padding: 5px 10px;
    background-color: #000;
    filter: alpha(opacity=50);
    -moz-opacity: 0.5;
    -khtml-opacity: 0.5;
    opacity: 0.5;
    color: #FFF;
    top: calc(120px - 13px);
    cursor: pointer;
}

.banner .angle-left:hover,
.banner .angle-right:hover {
    filter: alpha(opacity=100);
    -moz-opacity: 1;
    -khtml-opacity: 1;
    opacity: 1;
}

.banner .angle-left {
    left: 10px;
}

.banner .angle-right {
    right: 10px;
}

.col-1 {
    width: var(--a-width);
    margin-right: var(--i-width);
    background-color: var(--image-blue);
    height: 200px;
}

.col-3,
.sub-menu ul li {
    width: calc(var(--item-width)*3 - var(--i-width));
    margin-right: var(--i-width);
    margin-bottom: 20px;
    overflow: hidden;
}

.col-1 {
    width: var(--a-width);
    margin-right: var(--i-width);
    background-color: var(--image-blue);
    height: 200px;
}

.col-3,
.sub-menu ul li {
    width: calc(var(--item-width)*3 - var(--i-width));
    margin-right: var(--i-width);
    margin-bottom: 20px;
    overflow: hidden;
}

.sub-menu {
    margin: 30px 0;
    text-align: center;
    padding: 0 var(--out-i-width);
    width: calc(100% - var(--out-i-width)*2);
}

.sub-menu ul {
    width: calc(100% + var(--i-width));
}

.sub-menu ul li {
    float: left;
    text-align: center;
}

.sub-menu ul li .menu {
    background-color: var(--image-blue);
    color: #FFF;
    width: 4rem;
    height: 4rem;
    margin: 0 auto;
    font-size: 1.5rem;
    line-height: 4rem;
    border-radius: 50%;
}

.main-list {
    margin: 20px 0;
    text-align: left;
    padding: 0 var(--out-i-width);
    width: calc(100% - var(--out-i-width)*2);
}

.main-list .title {
    color: var(--active-blue);
    margin-bottom: 20px;
}

.main-list .content {
    width: calc(100% + var(--i-width));
    clear: both;
    display: inline-block;
}

.main-list .img-box {
    background-color: var(--image-blue);
    width: 100%;
    height: 200px;
}

.btn {
    display: inline-block;
    font-weight: 400;
    color: #FFF;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    background-color: var(--image-blue);
    border: 1px solid #FFF;
    padding: 0.2rem 0.75rem;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: 1.5rem;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.btn:hover {
    border: 1px solid var(--active-blue);
}



.list-btn {
    float: right;
}

.footer {
    background-color: var(--image-blue);
    font-size: 0.8rem;
    height: 120px;
    color: #FFF;
    vertical-align: middle;
}

.footer span {
    display: block;
    margin-top: 50px;
}

.footer a {
    color: #fff;
    font-size: bold;
}

.footer a:hover {
    color: #fff;
    text-decoration: underline;
}


/* .top-bar {
    background-color: #aaa;
    min-height: 45px;
} */

.m-t-10 {
    margin-top: 10px;
}

.m-b-10 {
    margin-bottom: 10px;
}

.m-l-10 {
    margin-left: 10px;
}

.m-r-10 {
    margin-right: 10px;
}

.w-100 {
    width: 100%;
}

.top-bar {
    position: fixed;
    top: 0;
    z-index: 1000;
    width: var(--total-width);
    background-color: #FFF;
}